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Overloading Macro on Number of Arguments
...OO(foo,bar,baz) # expands to FOO3(foo,bar,baz)
If you want a fourth one:
#define GET_MACRO(_1,_2,_3,_4,NAME,...) NAME
#define FOO(...) GET_MACRO(__VA_ARGS__, FOO4, FOO3, FOO2)(__VA_ARGS__)
FOO(a,b,c,d) # expeands to FOO4(a,b,c,d)
Naturally, if you define FOO2, FOO3 and FOO4, the ...
Adding options to a using jQuery?
...re details.
$('#select').append($('<option>', {value:1, text:'One'}));
$('#select').append('<option value="1">One</option>');
var option = new Option(text, value); $('#select').append($(option));
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What is simplest way to read a file into String? [duplicate]
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Yes, you can do this in one line (though for robust IOException handling you wouldn't want to).
String content = new Scanner(new File("filename")).useDelimiter("\\Z").next();
System.out.println(content);
This uses a java.util.Scanner, telling it ...
How to select only 1 row from oracle sql?
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I found this "solution" hidden in one of the comments. Since I was looking it up for a while, I'd like to highlight it a bit (can't yet comment or do such stuff...), so this is what I used:
SELECT * FROM (SELECT [Column] FROM [Table] ORDER BY [Date] DESC) WH...
What is the benefit of using Fragments in Android, rather than Views?
... weight and simpler to implement.
At first, I actually tried to build a phone/tablet app using custom views. Everything appeared to work across phones AND tablets, even switching from single panel to split panel. Where I ran into trouble was with the back button and life cycle. Since I was simpl...
Message Queue vs Message Bus — what are the differences?
...ecouple various systems.
Tibco by contrast was (sold as a) messaging backbone, where you could have multiple publishers and subscribers on the same topics.
Both however (and newer competing products) can play in each other's space these days. Both can be set to interrupt as well as polling for ne...
There can be only one auto column
How do I correct the error from MySQL 'you can only have one auto increment column'.
4 Answers
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Why prefer two's complement over sign-and-magnitude for signed numbers?
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It's done so that addition doesn't need to have any special logic for dealing with negative numbers. Check out the article on Wikipedia.
Say you have two numbers, 2 and -1. In your "intuitive" way of representing numbers, they wou...
ETag vs Header Expires
...le to figure out if I should use both an ETag and an Expires Header or one or the other.
8 Answers
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LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
...an return any amount of results but you state that you only want the first one.
I personally find the semantics very different and using the appropriate one, depending on the expected results, improves readability.
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